SSC 170 lb Garage Door Extension Spring – 27-48 Series – Orange – 8′ Door – Double Loop

🇺🇸 Made in USA

This SSC garage door extension spring is designed for compatible 8-foot-high sectional garage doors requiring a 170 lb spring rating. Part of the 27-48 Series, it features orange identification markings and double-loop ends for attachment to compatible extension-spring hardware.

Manufactured by Service Spring Corporation from black-coated, oil-tempered spring wire, this spring is rated for a minimum of 10,000 operating cycles. When properly matched to the door, it helps provide balanced lifting and reduces unnecessary strain on the opener.

Specifications

Understanding the 27-48 Measurement

The 27-48 designation refers to approximately 27 inches of relaxed spring length plus 48 inches of stretch, resulting in approximately 75 inches when extended.

48 inches is the stretch amount—not the total extended length. Match the spring series, rating, and end configuration rather than selecting a replacement by length alone.

Common Uses

• Replacing worn or broken extension springs on compatible 8-foot-high sectional garage doors.

• Restoring counterbalance in systems requiring 170 lb-rated springs.

• Servicing standard extension-spring installations with double-loop attachment ends.

Compatibility

This spring fits compatible extension-spring counterbalance systems, typically located alongside the horizontal tracks. It does not replace a torsion spring mounted on a shaft above the door.

Before ordering, verify:

• Door height: 8 feet.

• Spring series: 27-48.

• Required spring rating: 170 lb.

• End style: Double loop.

• Hardware: Compatible pulleys, cables, and spring attachment points.

Orange alone does not identify the correct spring. Extension-spring colors repeat across different ratings, so an orange 70 lb or 270 lb spring is not interchangeable with this 170 lb version.

In a conventional two-spring residential system, a matched pair of 170 lb-rated springs is used for an approximately 170 lb door—not a 340 lb door. Actual door weight and the complete counterbalance setup must be verified before replacement.

Installation Notes

Replacing both springs together is recommended when they are the same age to help maintain even lifting and consistent performance.

Inspect pulleys, lift cables, safety cables, and attachment hardware during replacement. Worn or damaged components should be replaced before returning the door to service.

Safety cables must run through each extension spring to help contain it if it breaks. This double-loop version does not include end clips.

Safety

Garage door springs operate under high tension and can cause serious injury. Professional installation is recommended. Never disconnect or adjust springs, cables, or attachment hardware while under tension.

Do not operate a door with a broken spring or use the garage door opener to overcome an unbalanced door.

Order the Correct Spring

Select this SSC 170 lb orange extension spring for an 8-foot door requiring the 27-48 Series and double-loop ends.If you are unsure of your spring rating or attachment style, contact Garage-DoorParts.com before ordering for help confirming the correct replacement.